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28 papers · 2 filters
The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
T. W. Shimwell, H. J. A. Röttgering, P. N. Best +69
The LOFAR Two-metre Sky Survey (LoTSS) is a deep 120-168 MHz imaging survey that will eventually cover the entire Northern sky. Each of the 3170 pointings will be observed for 8 hr…
William Herschel Telescope site characterization using the MOAO pathfinder CANARY on-sky data
O. A. Martin, C. M. Correia, E. Gendron +8
Canary is the Multi-Object Adaptive Optics (MOAO) pathfinder for the future MOAO-assisted Integral-Field Units (IFU) proposed for Extremely Large Telescopes (ELT). The MOAO concept…
Wave-front error breakdown in LGS MOAO validated on-sky by CANARY
O. A. Martin, É. Gendron., G. Rousset +7
CANARY is the multi-object adaptive optics (MOAO) on-sky pathfinder developed in the perspective of Multi-Object Spectrograph on Extremely Large Telescopes~(ELTs). In 2013, CANARY…
PSF reconstruction validated using on-sky CANARY data in MOAO mode
O. A. Martin, C. M. Correia, E. Gendron +8
In preparation of future Multi-Object Spectrographs (MOS) whose one of the major role is to provide an extensive statistical studies of high redshifted galaxies surveyed, the demon…
Optimizing the subwavelength grating of L-band Annular Groove Phase Masks for high coronagraphic performance
Ernesto Vargas Catalan, Elsa Huby, Pontus Forsberg +9
Context. The Annular Groove Phase Mask (AGPM) is one possible implementation of the vector vortex coronagraph, where the helical phase ramp is produced by a concentric subwavelengt…
Cosmic ray composition measurements and cosmic ray background free gamma-ray observations with Cherenkov telescopes
A. Neronov, D. V. Semikoz, Ie. Vovk +1
Muon component of extensive air showers (EAS) initiated by cosmic ray particles carries information on the primary particle identity. We show that the muon content of EAS could be…
Developing an integrated concept for the E-ELT Multi-Object Spectrograph (MOSAIC): design issues and trade-offs
Myriam Rodrigues, Gavin Dalton, Ewan Fitzsimons +6
We present a discussion of the design issues and trade-offs that have been considered in putting together a new concept for MOSAIC, the multi-object spectrograph for the E-ELT. MOS…
On-sky tests of sky-subtraction methods for fiber-fed spectrographs
Myriam Rodrigues, Michele Cirasuolo, Francois Hammer +8
We present preliminary results on on-sky test of sky subtraction methods for fiber-fed spectrograph. Using dedicated observation with FLAMES/VLT in I-band, we have tested the accur…
Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
Gaia Collaboration, A. G. A. Brown, A. Vallenari +5
At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magni…
The Gaia mission
Gaia Collaboration
Gaia is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original…
The E-ELT Multi-Object Spectrograph: latest news from MOSAIC
F. Hammer, S. Morris, L. Kaper +9
There are 8000 galaxies, including 1600 at z larger than 1.6, which could be simultaneously observed in an E-ELT field of view of 40 sq. arcmin. A considerable fraction of astrophy…
Polarimetry at millimeter wavelengths with the NIKA camera: calibration and performance
A. Ritacco, N. Ponthieu, A. Catalano +37
Magnetic fields, which play a major role in a large number of astrophysical processes from galactic to cosmological scales, can be traced via observations of dust polarization as d…
The Athena X-ray Integral Field Unit (X-IFU)
Didier Barret, Thien Lam Trong, Jan-Willem den Herder +88
The X-ray Integral Field Unit (X-IFU) on board the Advanced Telescope for High-ENergy Astrophysics (Athena) will provide spatially resolved high-resolution X-ray spectroscopy from…
Science Requirements and Trade-offs for the MOSAIC Instrument for the European ELT
C. J. Evans, M. Puech, M. Rodrigues +9
Building on the comprehensive White Paper on the scientific case for multi-object spectroscopy on the European ELT, we present the top-level instrument requirements that are being…
Instrumental performance and results from testing of the BLAST-TNG receiver, submillimeter optics, and MKID arrays
Nicholas Galitzki, Peter Ade, Francesco E. Angile +39
Polarized thermal emission from interstellar dust grains can be used to map magnetic fields in star forming molecular clouds and the diffuse interstellar medium (ISM). The Balloon-…
Astronomical photonics in the context of infrared interferometry and high-resolution spectroscopy
Lucas Labadie, Jean-Philippe Berger, Nick Cvetojevic +9
We review the potential of Astrophotonics, a relatively young field at the interface between photonics and astronomical instrumentation, for spectro-interferometry. We review some…
An overview of the mid-infrared spectro-interferometer MATISSE: science, concept, and current status
A. Matter, B. Lopez, P. Antonelli +104
MATISSE is the second-generation mid-infrared spectrograph and imager for the Very Large Telescope Interferometer (VLTI) at Paranal. This new interferometric instrument will allow…
The e-ASTROGAM gamma-ray space mission
V. Tatischeff, M. Tavani, P. von Ballmoos +48
The e-ASTROGAM is a gamma-ray space mission to be proposed as the M5 Medium-size mission of the European Space Agency. It is dedicated to the observation of the Universe with unpre…
The BRITE Constellation nanosatellite mission: Testing, commissioning and operations
H. Pablo, G. N. Whittaker, A. Popowicz +27
BRITE (BRIght Target Explorer) Constellation, the first nanosatellite mission applied to astrophysical research, is a collaboration among Austria, Canada and Poland. The fleet of s…
The QACITS pointing sensor: from theory to on-sky operation on Keck/NIRC2
Elsa Huby, Olivier Absil, Dimitri Mawet +5
Small inner working angle coronagraphs are essential to benefit from the full potential of large and future extremely large ground-based telescopes, especially in the context of th…
Three years of harvest with the vector vortex coronagraph in the thermal infrared
Olivier Absil, Dimitri Mawet, Mikael Karlsson +25
For several years, we have been developing vortex phase masks based on sub-wavelength gratings, known as Annular Groove Phase Masks. Etched onto diamond substrates, these AGPMs are…
High-precision astrometry towards ELTs
Davide Massari, Giuliana Fiorentino, Eline Tolstoy +13
With the aim of paving the road for future accurate astrometry with MICADO at the European-ELT, we performed an astrometric study using two different but complementary approaches t…
Using baseline-dependent window functions for data compression and field-of-interest shaping in radio interferometry
M. T. Atemkeng, O. M. Smirnov, C. Tasse +2
In radio interferometry, observed visibilities are intrinsically sampled at some interval in time and frequency. Modern interferometers are capable of producing data at very high t…
HIRAX: A Probe of Dark Energy and Radio Transients
L. B. Newburgh, K. Bandura, M. A. Bucher +33
The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) is a new 400-800MHz radio interferometer under development for deployment in South Africa. HIRAX will comprise 1024…